In recent decades world supply of oil has been increasingly held in the Islamic countries around the Persian Gulf. The fact that the level of oil production is high in these countries and that they possess most of the world's oil reserves could be extremely significant. This 'petropower' could lead to strategic geopolitical developments when oil is used as economic and political weapons. It may be that the apocalyptic appeal of militant Islamism coming out of Iran can weld both Shia and Sunni people of the region to the cause of establishing a world Islamic 'caliphate'. This may appear in a new world of a tripartite mix of superpowers, one of which could be an Iranian-led oil rich Islamic bloc of Gulf states. Each superpower would vie for advantage, and particularly two of these superpowers would seek favor in maintaining supplies of oil imports increasingly from a potentially Iran dominated mix of oil producing Islamic countries. .